./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loops/ludcmp.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9bd2c7ff Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81aa32e4-2f94-4f15-ba49-2a3f1e65f3ab/bin/uautomizer-verify-uCwYo4JHxu/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81aa32e4-2f94-4f15-ba49-2a3f1e65f3ab/bin/uautomizer-verify-uCwYo4JHxu/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81aa32e4-2f94-4f15-ba49-2a3f1e65f3ab/bin/uautomizer-verify-uCwYo4JHxu/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81aa32e4-2f94-4f15-ba49-2a3f1e65f3ab/bin/uautomizer-verify-uCwYo4JHxu/config/AutomizerReach.xml -i ../../sv-benchmarks/c/loops/ludcmp.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81aa32e4-2f94-4f15-ba49-2a3f1e65f3ab/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81aa32e4-2f94-4f15-ba49-2a3f1e65f3ab/bin/uautomizer-verify-uCwYo4JHxu --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 45bf8892eb23096ca55c36a274511a87f80900e96066e62793920cbba0252ec0 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 07:56:44,820 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 07:56:44,913 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81aa32e4-2f94-4f15-ba49-2a3f1e65f3ab/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-19 07:56:44,920 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 07:56:44,921 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 07:56:44,970 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 07:56:44,971 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 07:56:44,972 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 07:56:44,973 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 07:56:44,978 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 07:56:44,978 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-19 07:56:44,979 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-19 07:56:44,979 INFO L153 SettingsManager]: * Use SBE=true [2023-11-19 07:56:44,981 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 07:56:44,982 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-19 07:56:44,982 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-19 07:56:44,982 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 07:56:44,983 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-19 07:56:44,983 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 07:56:44,984 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-19 07:56:44,984 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 07:56:44,985 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-19 07:56:44,985 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-19 07:56:44,985 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-19 07:56:44,986 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 07:56:44,987 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 07:56:44,987 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-19 07:56:44,988 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 07:56:44,988 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 07:56:44,988 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 07:56:44,990 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 07:56:44,990 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-19 07:56:44,990 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-19 07:56:44,991 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 07:56:44,991 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-19 07:56:44,991 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-19 07:56:44,991 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-19 07:56:44,991 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 07:56:44,992 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-19 07:56:44,992 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81aa32e4-2f94-4f15-ba49-2a3f1e65f3ab/bin/uautomizer-verify-uCwYo4JHxu/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81aa32e4-2f94-4f15-ba49-2a3f1e65f3ab/bin/uautomizer-verify-uCwYo4JHxu Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 45bf8892eb23096ca55c36a274511a87f80900e96066e62793920cbba0252ec0 [2023-11-19 07:56:45,243 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 07:56:45,269 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 07:56:45,272 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 07:56:45,273 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 07:56:45,274 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 07:56:45,275 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81aa32e4-2f94-4f15-ba49-2a3f1e65f3ab/bin/uautomizer-verify-uCwYo4JHxu/../../sv-benchmarks/c/loops/ludcmp.c [2023-11-19 07:56:48,471 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 07:56:48,760 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 07:56:48,761 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81aa32e4-2f94-4f15-ba49-2a3f1e65f3ab/sv-benchmarks/c/loops/ludcmp.c [2023-11-19 07:56:48,772 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81aa32e4-2f94-4f15-ba49-2a3f1e65f3ab/bin/uautomizer-verify-uCwYo4JHxu/data/5c5e90429/2c6cc8ea66e54e0d8418b8e3cc6148e2/FLAG98030544b [2023-11-19 07:56:48,792 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81aa32e4-2f94-4f15-ba49-2a3f1e65f3ab/bin/uautomizer-verify-uCwYo4JHxu/data/5c5e90429/2c6cc8ea66e54e0d8418b8e3cc6148e2 [2023-11-19 07:56:48,800 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 07:56:48,802 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 07:56:48,805 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 07:56:48,806 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 07:56:48,813 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 07:56:48,814 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:56:48" (1/1) ... [2023-11-19 07:56:48,815 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@49783ef2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:56:48, skipping insertion in model container [2023-11-19 07:56:48,815 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:56:48" (1/1) ... [2023-11-19 07:56:48,843 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 07:56:48,988 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81aa32e4-2f94-4f15-ba49-2a3f1e65f3ab/sv-benchmarks/c/loops/ludcmp.c[318,331] [2023-11-19 07:56:49,030 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 07:56:49,043 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 07:56:49,056 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81aa32e4-2f94-4f15-ba49-2a3f1e65f3ab/sv-benchmarks/c/loops/ludcmp.c[318,331] [2023-11-19 07:56:49,087 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 07:56:49,108 INFO L206 MainTranslator]: Completed translation [2023-11-19 07:56:49,109 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:56:49 WrapperNode [2023-11-19 07:56:49,109 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 07:56:49,111 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 07:56:49,111 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 07:56:49,111 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 07:56:49,120 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:56:49" (1/1) ... [2023-11-19 07:56:49,130 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:56:49" (1/1) ... [2023-11-19 07:56:49,165 INFO L138 Inliner]: procedures = 17, calls = 47, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 223 [2023-11-19 07:56:49,166 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 07:56:49,166 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 07:56:49,167 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 07:56:49,167 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 07:56:49,177 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:56:49" (1/1) ... [2023-11-19 07:56:49,178 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:56:49" (1/1) ... [2023-11-19 07:56:49,182 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:56:49" (1/1) ... [2023-11-19 07:56:49,182 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:56:49" (1/1) ... [2023-11-19 07:56:49,194 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:56:49" (1/1) ... [2023-11-19 07:56:49,213 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:56:49" (1/1) ... [2023-11-19 07:56:49,225 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:56:49" (1/1) ... [2023-11-19 07:56:49,227 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:56:49" (1/1) ... [2023-11-19 07:56:49,231 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 07:56:49,232 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 07:56:49,232 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 07:56:49,232 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 07:56:49,233 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:56:49" (1/1) ... [2023-11-19 07:56:49,251 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 07:56:49,263 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81aa32e4-2f94-4f15-ba49-2a3f1e65f3ab/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:56:49,283 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81aa32e4-2f94-4f15-ba49-2a3f1e65f3ab/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 07:56:49,303 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81aa32e4-2f94-4f15-ba49-2a3f1e65f3ab/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 07:56:49,332 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 07:56:49,332 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-19 07:56:49,332 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-19 07:56:49,333 INFO L130 BoogieDeclarations]: Found specification of procedure read~real [2023-11-19 07:56:49,333 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2023-11-19 07:56:49,333 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 07:56:49,334 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 07:56:49,334 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-19 07:56:49,419 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 07:56:49,422 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 07:56:49,802 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 07:56:49,810 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 07:56:49,810 INFO L302 CfgBuilder]: Removed 11 assume(true) statements. [2023-11-19 07:56:49,814 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:56:49 BoogieIcfgContainer [2023-11-19 07:56:49,814 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 07:56:49,817 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 07:56:49,818 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 07:56:49,822 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 07:56:49,822 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 07:56:48" (1/3) ... [2023-11-19 07:56:49,823 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@511332f8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:56:49, skipping insertion in model container [2023-11-19 07:56:49,824 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:56:49" (2/3) ... [2023-11-19 07:56:49,824 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@511332f8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:56:49, skipping insertion in model container [2023-11-19 07:56:49,825 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:56:49" (3/3) ... [2023-11-19 07:56:49,827 INFO L112 eAbstractionObserver]: Analyzing ICFG ludcmp.c [2023-11-19 07:56:49,849 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 07:56:49,849 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-19 07:56:49,909 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 07:56:49,915 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@14c43ffa, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-19 07:56:49,915 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-19 07:56:49,919 INFO L276 IsEmpty]: Start isEmpty. Operand has 50 states, 48 states have (on average 1.6041666666666667) internal successors, (77), 49 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:56:49,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-11-19 07:56:49,925 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:56:49,926 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:56:49,926 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:56:49,931 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:56:49,931 INFO L85 PathProgramCache]: Analyzing trace with hash 1809811384, now seen corresponding path program 1 times [2023-11-19 07:56:49,939 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:56:49,940 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [23785876] [2023-11-19 07:56:49,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:56:49,941 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:56:50,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:56:50,289 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:56:50,290 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:56:50,291 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [23785876] [2023-11-19 07:56:50,291 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [23785876] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:56:50,292 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:56:50,292 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-19 07:56:50,294 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287182832] [2023-11-19 07:56:50,295 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:56:50,299 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 07:56:50,300 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:56:50,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 07:56:50,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-19 07:56:50,346 INFO L87 Difference]: Start difference. First operand has 50 states, 48 states have (on average 1.6041666666666667) internal successors, (77), 49 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:56:50,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:56:50,465 INFO L93 Difference]: Finished difference Result 102 states and 159 transitions. [2023-11-19 07:56:50,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 07:56:50,468 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2023-11-19 07:56:50,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:56:50,510 INFO L225 Difference]: With dead ends: 102 [2023-11-19 07:56:50,510 INFO L226 Difference]: Without dead ends: 17 [2023-11-19 07:56:50,514 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-19 07:56:50,517 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 65 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 07:56:50,519 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 114 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 07:56:50,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2023-11-19 07:56:50,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 14. [2023-11-19 07:56:50,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 13 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:56:50,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2023-11-19 07:56:50,559 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 7 [2023-11-19 07:56:50,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:56:50,559 INFO L495 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2023-11-19 07:56:50,560 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:56:50,560 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2023-11-19 07:56:50,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-11-19 07:56:50,561 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:56:50,561 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:56:50,562 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-19 07:56:50,562 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:56:50,563 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:56:50,563 INFO L85 PathProgramCache]: Analyzing trace with hash -1948892579, now seen corresponding path program 1 times [2023-11-19 07:56:50,563 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:56:50,564 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [376080668] [2023-11-19 07:56:50,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:56:50,565 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:56:50,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:56:50,780 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:56:50,781 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:56:50,782 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [376080668] [2023-11-19 07:56:50,782 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [376080668] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:56:50,782 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1284718522] [2023-11-19 07:56:50,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:56:50,783 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:56:50,784 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81aa32e4-2f94-4f15-ba49-2a3f1e65f3ab/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:56:50,786 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81aa32e4-2f94-4f15-ba49-2a3f1e65f3ab/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:56:50,807 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81aa32e4-2f94-4f15-ba49-2a3f1e65f3ab/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-19 07:56:50,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:56:50,879 INFO L262 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-19 07:56:50,884 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:56:50,987 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:56:50,988 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:56:51,049 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:56:51,052 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1284718522] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:56:51,052 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:56:51,052 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2023-11-19 07:56:51,053 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670959509] [2023-11-19 07:56:51,054 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:56:51,055 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-19 07:56:51,055 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:56:51,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-19 07:56:51,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=64, Unknown=0, NotChecked=0, Total=110 [2023-11-19 07:56:51,059 INFO L87 Difference]: Start difference. First operand 14 states and 16 transitions. Second operand has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:56:51,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:56:51,152 INFO L93 Difference]: Finished difference Result 38 states and 48 transitions. [2023-11-19 07:56:51,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-19 07:56:51,153 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2023-11-19 07:56:51,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:56:51,154 INFO L225 Difference]: With dead ends: 38 [2023-11-19 07:56:51,155 INFO L226 Difference]: Without dead ends: 26 [2023-11-19 07:56:51,156 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=64, Invalid=92, Unknown=0, NotChecked=0, Total=156 [2023-11-19 07:56:51,159 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 40 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-19 07:56:51,159 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 36 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 07:56:51,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2023-11-19 07:56:51,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2023-11-19 07:56:51,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.24) internal successors, (31), 25 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:56:51,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 31 transitions. [2023-11-19 07:56:51,172 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 31 transitions. Word has length 11 [2023-11-19 07:56:51,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:56:51,173 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 31 transitions. [2023-11-19 07:56:51,173 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:56:51,173 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 31 transitions. [2023-11-19 07:56:51,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-11-19 07:56:51,174 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:56:51,175 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:56:51,200 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81aa32e4-2f94-4f15-ba49-2a3f1e65f3ab/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-19 07:56:51,391 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81aa32e4-2f94-4f15-ba49-2a3f1e65f3ab/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:56:51,392 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:56:51,392 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:56:51,392 INFO L85 PathProgramCache]: Analyzing trace with hash -439332020, now seen corresponding path program 2 times [2023-11-19 07:56:51,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:56:51,393 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1441847937] [2023-11-19 07:56:51,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:56:51,393 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:56:51,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:56:51,573 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-19 07:56:51,573 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:56:51,576 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1441847937] [2023-11-19 07:56:51,576 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1441847937] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:56:51,576 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:56:51,576 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-19 07:56:51,577 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337665846] [2023-11-19 07:56:51,577 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:56:51,579 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 07:56:51,580 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:56:51,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 07:56:51,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-19 07:56:51,585 INFO L87 Difference]: Start difference. First operand 26 states and 31 transitions. Second operand has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:56:51,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:56:51,627 INFO L93 Difference]: Finished difference Result 78 states and 92 transitions. [2023-11-19 07:56:51,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 07:56:51,628 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2023-11-19 07:56:51,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:56:51,629 INFO L225 Difference]: With dead ends: 78 [2023-11-19 07:56:51,629 INFO L226 Difference]: Without dead ends: 54 [2023-11-19 07:56:51,630 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-19 07:56:51,631 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 8 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-19 07:56:51,632 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 21 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 07:56:51,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2023-11-19 07:56:51,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 41. [2023-11-19 07:56:51,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 40 states have (on average 1.175) internal successors, (47), 40 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:56:51,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 47 transitions. [2023-11-19 07:56:51,641 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 47 transitions. Word has length 23 [2023-11-19 07:56:51,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:56:51,641 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 47 transitions. [2023-11-19 07:56:51,641 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:56:51,641 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 47 transitions. [2023-11-19 07:56:51,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-11-19 07:56:51,642 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:56:51,643 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:56:51,643 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-19 07:56:51,648 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:56:51,649 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:56:51,649 INFO L85 PathProgramCache]: Analyzing trace with hash 756876242, now seen corresponding path program 1 times [2023-11-19 07:56:51,649 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:56:51,653 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [16580122] [2023-11-19 07:56:51,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:56:51,654 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:56:51,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:56:51,875 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:56:51,875 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:56:51,876 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [16580122] [2023-11-19 07:56:51,876 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [16580122] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:56:51,876 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [564776250] [2023-11-19 07:56:51,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:56:51,877 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:56:51,877 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81aa32e4-2f94-4f15-ba49-2a3f1e65f3ab/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:56:51,878 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81aa32e4-2f94-4f15-ba49-2a3f1e65f3ab/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:56:51,904 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81aa32e4-2f94-4f15-ba49-2a3f1e65f3ab/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-19 07:56:51,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:56:51,973 INFO L262 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-19 07:56:51,975 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:56:52,119 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:56:52,119 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:56:52,225 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:56:52,225 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [564776250] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:56:52,225 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:56:52,226 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 20 [2023-11-19 07:56:52,226 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229778192] [2023-11-19 07:56:52,226 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:56:52,227 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-19 07:56:52,227 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:56:52,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-19 07:56:52,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=232, Unknown=0, NotChecked=0, Total=380 [2023-11-19 07:56:52,229 INFO L87 Difference]: Start difference. First operand 41 states and 47 transitions. Second operand has 20 states, 20 states have (on average 3.05) internal successors, (61), 20 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:56:52,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:56:52,347 INFO L93 Difference]: Finished difference Result 96 states and 114 transitions. [2023-11-19 07:56:52,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-19 07:56:52,350 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.05) internal successors, (61), 20 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2023-11-19 07:56:52,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:56:52,353 INFO L225 Difference]: With dead ends: 96 [2023-11-19 07:56:52,353 INFO L226 Difference]: Without dead ends: 57 [2023-11-19 07:56:52,354 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=159, Invalid=261, Unknown=0, NotChecked=0, Total=420 [2023-11-19 07:56:52,359 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 66 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 07:56:52,363 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 48 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 07:56:52,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2023-11-19 07:56:52,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2023-11-19 07:56:52,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 56 states have (on average 1.1607142857142858) internal successors, (65), 56 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:56:52,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 65 transitions. [2023-11-19 07:56:52,378 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 65 transitions. Word has length 23 [2023-11-19 07:56:52,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:56:52,378 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 65 transitions. [2023-11-19 07:56:52,379 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.05) internal successors, (61), 20 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:56:52,379 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 65 transitions. [2023-11-19 07:56:52,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-11-19 07:56:52,380 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:56:52,380 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:56:52,407 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81aa32e4-2f94-4f15-ba49-2a3f1e65f3ab/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-19 07:56:52,581 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81aa32e4-2f94-4f15-ba49-2a3f1e65f3ab/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:56:52,581 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:56:52,582 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:56:52,582 INFO L85 PathProgramCache]: Analyzing trace with hash 58704032, now seen corresponding path program 2 times [2023-11-19 07:56:52,582 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:56:52,582 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [846307939] [2023-11-19 07:56:52,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:56:52,582 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:56:52,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-19 07:56:52,639 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-19 07:56:52,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-19 07:56:52,676 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-19 07:56:52,677 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-19 07:56:52,678 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-11-19 07:56:52,680 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-19 07:56:52,684 INFO L445 BasicCegarLoop]: Path program histogram: [2, 2, 1] [2023-11-19 07:56:52,687 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-11-19 07:56:52,748 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.11 07:56:52 BoogieIcfgContainer [2023-11-19 07:56:52,750 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-11-19 07:56:52,751 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-11-19 07:56:52,751 INFO L270 PluginConnector]: Initializing Witness Printer... [2023-11-19 07:56:52,751 INFO L274 PluginConnector]: Witness Printer initialized [2023-11-19 07:56:52,752 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:56:49" (3/4) ... [2023-11-19 07:56:52,754 INFO L140 WitnessPrinter]: No result that supports witness generation found [2023-11-19 07:56:52,755 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-11-19 07:56:52,756 INFO L158 Benchmark]: Toolchain (without parser) took 3954.09ms. Allocated memory was 134.2MB in the beginning and 176.2MB in the end (delta: 41.9MB). Free memory was 102.9MB in the beginning and 93.6MB in the end (delta: 9.3MB). Peak memory consumption was 53.6MB. Max. memory is 16.1GB. [2023-11-19 07:56:52,756 INFO L158 Benchmark]: CDTParser took 0.30ms. Allocated memory is still 96.5MB. Free memory was 46.9MB in the beginning and 46.8MB in the end (delta: 117.5kB). There was no memory consumed. Max. memory is 16.1GB. [2023-11-19 07:56:52,757 INFO L158 Benchmark]: CACSL2BoogieTranslator took 304.41ms. Allocated memory is still 134.2MB. Free memory was 102.9MB in the beginning and 89.9MB in the end (delta: 13.0MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2023-11-19 07:56:52,757 INFO L158 Benchmark]: Boogie Procedure Inliner took 55.03ms. Allocated memory is still 134.2MB. Free memory was 89.9MB in the beginning and 87.8MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-11-19 07:56:52,757 INFO L158 Benchmark]: Boogie Preprocessor took 64.86ms. Allocated memory is still 134.2MB. Free memory was 87.8MB in the beginning and 85.7MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-11-19 07:56:52,758 INFO L158 Benchmark]: RCFGBuilder took 582.39ms. Allocated memory is still 134.2MB. Free memory was 85.7MB in the beginning and 68.0MB in the end (delta: 17.7MB). Peak memory consumption was 18.9MB. Max. memory is 16.1GB. [2023-11-19 07:56:52,758 INFO L158 Benchmark]: TraceAbstraction took 2932.42ms. Allocated memory was 134.2MB in the beginning and 176.2MB in the end (delta: 41.9MB). Free memory was 67.4MB in the beginning and 93.6MB in the end (delta: -26.2MB). Peak memory consumption was 18.0MB. Max. memory is 16.1GB. [2023-11-19 07:56:52,759 INFO L158 Benchmark]: Witness Printer took 4.79ms. Allocated memory is still 176.2MB. Free memory is still 93.6MB. There was no memory consumed. Max. memory is 16.1GB. [2023-11-19 07:56:52,761 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.30ms. Allocated memory is still 96.5MB. Free memory was 46.9MB in the beginning and 46.8MB in the end (delta: 117.5kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 304.41ms. Allocated memory is still 134.2MB. Free memory was 102.9MB in the beginning and 89.9MB in the end (delta: 13.0MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 55.03ms. Allocated memory is still 134.2MB. Free memory was 89.9MB in the beginning and 87.8MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 64.86ms. Allocated memory is still 134.2MB. Free memory was 87.8MB in the beginning and 85.7MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 582.39ms. Allocated memory is still 134.2MB. Free memory was 85.7MB in the beginning and 68.0MB in the end (delta: 17.7MB). Peak memory consumption was 18.9MB. Max. memory is 16.1GB. * TraceAbstraction took 2932.42ms. Allocated memory was 134.2MB in the beginning and 176.2MB in the end (delta: 41.9MB). Free memory was 67.4MB in the beginning and 93.6MB in the end (delta: -26.2MB). Peak memory consumption was 18.0MB. Max. memory is 16.1GB. * Witness Printer took 4.79ms. Allocated memory is still 176.2MB. Free memory is still 93.6MB. There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 7]: Unable to prove that a call to reach_error is unreachable Unable to prove that a call to reach_error is unreachable Reason: overapproximation of to_real at line 98, overapproximation of someBinaryArithmeticDOUBLEoperation at line 100. Possible FailurePath: [L71] double a[50][50], b[50], x[50]; VAL [a={4:0}, b={5:0}, x={6:0}] [L88] int i, j, nmax = 50, n = 5, chkerr; [L89] double eps, w; [L91] eps = 1.0e-6 [L93] i = 0 VAL [a={4:0}, b={5:0}, eps=1/1000000, i=0, n=5, nmax=50, x={6:0}] [L93] COND TRUE i <= n [L95] w = 0.0 [L96] j = 0 VAL [a={4:0}, b={5:0}, eps=1/1000000, i=0, j=0, n=5, nmax=50, w=0, x={6:0}] [L96] COND TRUE j <= n [L98] a[i][j] = (i + 1) + (j + 1) VAL [a={4:0}, b={5:0}, eps=1/1000000, i=0, j=0, n=5, nmax=50, w=0, x={6:0}] [L99] COND TRUE i == j [L99] EXPR a[i][j] [L99] a[i][j] *= 10.0 [L100] EXPR a[i][j] [L100] w += a[i][j] [L96] j++ VAL [a={4:0}, b={5:0}, eps=1/1000000, i=0, j=1, n=5, nmax=50, x={6:0}] [L96] COND TRUE j <= n [L98] a[i][j] = (i + 1) + (j + 1) VAL [a={4:0}, b={5:0}, eps=1/1000000, i=0, j=1, n=5, nmax=50, x={6:0}] [L99] COND FALSE !(i == j) VAL [a={4:0}, b={5:0}, eps=1/1000000, i=0, j=1, n=5, nmax=50, x={6:0}] [L100] EXPR a[i][j] [L100] w += a[i][j] [L96] j++ VAL [a={4:0}, b={5:0}, eps=1/1000000, i=0, j=2, n=5, nmax=50, x={6:0}] [L96] COND TRUE j <= n [L98] a[i][j] = (i + 1) + (j + 1) VAL [a={4:0}, b={5:0}, eps=1/1000000, i=0, j=2, n=5, nmax=50, x={6:0}] [L99] COND FALSE !(i == j) VAL [a={4:0}, b={5:0}, eps=1/1000000, i=0, j=2, n=5, nmax=50, x={6:0}] [L100] EXPR a[i][j] [L100] w += a[i][j] [L96] j++ VAL [a={4:0}, b={5:0}, eps=1/1000000, i=0, j=3, n=5, nmax=50, x={6:0}] [L96] COND TRUE j <= n [L98] a[i][j] = (i + 1) + (j + 1) VAL [a={4:0}, b={5:0}, eps=1/1000000, i=0, j=3, n=5, nmax=50, x={6:0}] [L99] COND FALSE !(i == j) VAL [a={4:0}, b={5:0}, eps=1/1000000, i=0, j=3, n=5, nmax=50, x={6:0}] [L100] EXPR a[i][j] [L100] w += a[i][j] [L96] j++ VAL [a={4:0}, b={5:0}, eps=1/1000000, i=0, j=4, n=5, nmax=50, x={6:0}] [L96] COND TRUE j <= n [L98] a[i][j] = (i + 1) + (j + 1) VAL [a={4:0}, b={5:0}, eps=1/1000000, i=0, j=4, n=5, nmax=50, x={6:0}] [L99] COND FALSE !(i == j) VAL [a={4:0}, b={5:0}, eps=1/1000000, i=0, j=4, n=5, nmax=50, x={6:0}] [L100] EXPR a[i][j] [L100] w += a[i][j] [L96] j++ VAL [a={4:0}, b={5:0}, eps=1/1000000, i=0, j=5, n=5, nmax=50, x={6:0}] [L96] COND TRUE j <= n [L98] a[i][j] = (i + 1) + (j + 1) VAL [a={4:0}, b={5:0}, eps=1/1000000, i=0, j=5, n=5, nmax=50, x={6:0}] [L99] COND FALSE !(i == j) VAL [a={4:0}, b={5:0}, eps=1/1000000, i=0, j=5, n=5, nmax=50, x={6:0}] [L100] EXPR a[i][j] [L100] w += a[i][j] [L96] j++ VAL [a={4:0}, b={5:0}, eps=1/1000000, i=0, j=6, n=5, nmax=50, x={6:0}] [L96] COND FALSE !(j <= n) VAL [a={4:0}, b={5:0}, eps=1/1000000, i=0, j=6, n=5, nmax=50, x={6:0}] [L102] CALL __VERIFIER_assert(i==2) [L6] COND TRUE !(cond) VAL [\old(cond)=0, a={4:0}, b={5:0}, cond=0, x={6:0}] [L7] reach_error() VAL [\old(cond)=0, a={4:0}, b={5:0}, cond=0, x={6:0}] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 50 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 2.8s, OverallIterations: 5, TraceHistogramMax: 6, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 0.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 179 SdHoareTripleChecker+Valid, 0.2s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 179 mSDsluCounter, 219 SdHoareTripleChecker+Invalid, 0.2s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 133 mSDsCounter, 4 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 128 IncrementalHoareTripleChecker+Invalid, 132 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 4 mSolverCounterUnsat, 86 mSDtfsCounter, 128 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 88 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 0.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=57occurred in iteration=4, InterpolantAutomatonStates: 24, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 4 MinimizatonAttempts, 16 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 1.1s InterpolantComputationTime, 129 NumberOfCodeBlocks, 129 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 124 ConstructedInterpolants, 0 QuantifiedInterpolants, 488 SizeOfPredicates, 4 NumberOfNonLiveVariables, 223 ConjunctsInSsa, 11 ConjunctsInUnsatCore, 8 InterpolantComputations, 2 PerfectInterpolantSequences, 28/115 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2023-11-19 07:56:52,803 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81aa32e4-2f94-4f15-ba49-2a3f1e65f3ab/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81aa32e4-2f94-4f15-ba49-2a3f1e65f3ab/bin/uautomizer-verify-uCwYo4JHxu/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81aa32e4-2f94-4f15-ba49-2a3f1e65f3ab/bin/uautomizer-verify-uCwYo4JHxu/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81aa32e4-2f94-4f15-ba49-2a3f1e65f3ab/bin/uautomizer-verify-uCwYo4JHxu/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81aa32e4-2f94-4f15-ba49-2a3f1e65f3ab/bin/uautomizer-verify-uCwYo4JHxu/config/AutomizerReach.xml -i ../../sv-benchmarks/c/loops/ludcmp.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81aa32e4-2f94-4f15-ba49-2a3f1e65f3ab/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-Reach-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81aa32e4-2f94-4f15-ba49-2a3f1e65f3ab/bin/uautomizer-verify-uCwYo4JHxu --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 45bf8892eb23096ca55c36a274511a87f80900e96066e62793920cbba0252ec0 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 07:56:55,611 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 07:56:55,720 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81aa32e4-2f94-4f15-ba49-2a3f1e65f3ab/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2023-11-19 07:56:55,726 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 07:56:55,727 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 07:56:55,763 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 07:56:55,764 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 07:56:55,765 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 07:56:55,766 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 07:56:55,767 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 07:56:55,768 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-19 07:56:55,769 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-19 07:56:55,769 INFO L153 SettingsManager]: * Use SBE=true [2023-11-19 07:56:55,770 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 07:56:55,771 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-19 07:56:55,772 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-19 07:56:55,772 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-19 07:56:55,773 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 07:56:55,774 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-19 07:56:55,774 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 07:56:55,775 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-19 07:56:55,776 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-19 07:56:55,776 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2023-11-19 07:56:55,777 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-11-19 07:56:55,777 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-19 07:56:55,778 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-19 07:56:55,778 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 07:56:55,779 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 07:56:55,780 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-19 07:56:55,780 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 07:56:55,781 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 07:56:55,781 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 07:56:55,782 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 07:56:55,782 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-19 07:56:55,782 INFO L153 SettingsManager]: * Trace refinement strategy=WOLF [2023-11-19 07:56:55,783 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-11-19 07:56:55,783 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-19 07:56:55,783 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-19 07:56:55,784 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-19 07:56:55,784 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 07:56:55,784 INFO L153 SettingsManager]: * Logic for external solver=AUFBV [2023-11-19 07:56:55,785 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-19 07:56:55,785 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81aa32e4-2f94-4f15-ba49-2a3f1e65f3ab/bin/uautomizer-verify-uCwYo4JHxu/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81aa32e4-2f94-4f15-ba49-2a3f1e65f3ab/bin/uautomizer-verify-uCwYo4JHxu Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 45bf8892eb23096ca55c36a274511a87f80900e96066e62793920cbba0252ec0 [2023-11-19 07:56:56,188 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 07:56:56,212 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 07:56:56,215 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 07:56:56,216 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 07:56:56,217 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 07:56:56,218 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81aa32e4-2f94-4f15-ba49-2a3f1e65f3ab/bin/uautomizer-verify-uCwYo4JHxu/../../sv-benchmarks/c/loops/ludcmp.c [2023-11-19 07:56:59,467 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 07:56:59,741 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 07:56:59,742 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81aa32e4-2f94-4f15-ba49-2a3f1e65f3ab/sv-benchmarks/c/loops/ludcmp.c [2023-11-19 07:56:59,753 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81aa32e4-2f94-4f15-ba49-2a3f1e65f3ab/bin/uautomizer-verify-uCwYo4JHxu/data/1a2a6e988/4062ae6f138e4c11bd712f52d169ddbd/FLAGc68278ba4 [2023-11-19 07:56:59,769 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81aa32e4-2f94-4f15-ba49-2a3f1e65f3ab/bin/uautomizer-verify-uCwYo4JHxu/data/1a2a6e988/4062ae6f138e4c11bd712f52d169ddbd [2023-11-19 07:56:59,772 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 07:56:59,773 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 07:56:59,775 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 07:56:59,775 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 07:56:59,781 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 07:56:59,782 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:56:59" (1/1) ... [2023-11-19 07:56:59,783 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4acd5cca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:56:59, skipping insertion in model container [2023-11-19 07:56:59,783 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:56:59" (1/1) ... [2023-11-19 07:56:59,817 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 07:57:00,008 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81aa32e4-2f94-4f15-ba49-2a3f1e65f3ab/sv-benchmarks/c/loops/ludcmp.c[318,331] [2023-11-19 07:57:00,097 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 07:57:00,121 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 07:57:00,140 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81aa32e4-2f94-4f15-ba49-2a3f1e65f3ab/sv-benchmarks/c/loops/ludcmp.c[318,331] [2023-11-19 07:57:00,201 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 07:57:00,230 INFO L206 MainTranslator]: Completed translation [2023-11-19 07:57:00,231 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:57:00 WrapperNode [2023-11-19 07:57:00,231 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 07:57:00,233 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 07:57:00,234 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 07:57:00,234 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 07:57:00,242 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:57:00" (1/1) ... [2023-11-19 07:57:00,273 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:57:00" (1/1) ... [2023-11-19 07:57:00,325 INFO L138 Inliner]: procedures = 18, calls = 47, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 223 [2023-11-19 07:57:00,325 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 07:57:00,326 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 07:57:00,326 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 07:57:00,326 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 07:57:00,338 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:57:00" (1/1) ... [2023-11-19 07:57:00,339 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:57:00" (1/1) ... [2023-11-19 07:57:00,355 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:57:00" (1/1) ... [2023-11-19 07:57:00,356 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:57:00" (1/1) ... [2023-11-19 07:57:00,382 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:57:00" (1/1) ... [2023-11-19 07:57:00,401 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:57:00" (1/1) ... [2023-11-19 07:57:00,405 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:57:00" (1/1) ... [2023-11-19 07:57:00,407 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:57:00" (1/1) ... [2023-11-19 07:57:00,421 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 07:57:00,422 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 07:57:00,422 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 07:57:00,423 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 07:57:00,424 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:57:00" (1/1) ... [2023-11-19 07:57:00,431 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 07:57:00,444 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81aa32e4-2f94-4f15-ba49-2a3f1e65f3ab/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:57:00,457 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81aa32e4-2f94-4f15-ba49-2a3f1e65f3ab/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 07:57:00,487 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81aa32e4-2f94-4f15-ba49-2a3f1e65f3ab/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 07:57:00,508 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 07:57:00,508 INFO L130 BoogieDeclarations]: Found specification of procedure read~intFLOATTYPE8 [2023-11-19 07:57:00,508 INFO L130 BoogieDeclarations]: Found specification of procedure write~intFLOATTYPE8 [2023-11-19 07:57:00,508 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2023-11-19 07:57:00,509 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-19 07:57:00,510 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 07:57:00,510 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 07:57:00,510 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-19 07:57:00,651 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 07:57:00,655 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 07:57:16,440 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 07:57:16,448 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 07:57:16,449 INFO L302 CfgBuilder]: Removed 11 assume(true) statements. [2023-11-19 07:57:16,453 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:57:16 BoogieIcfgContainer [2023-11-19 07:57:16,454 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 07:57:16,459 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 07:57:16,459 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 07:57:16,463 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 07:57:16,463 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 07:56:59" (1/3) ... [2023-11-19 07:57:16,464 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b86fc18 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:57:16, skipping insertion in model container [2023-11-19 07:57:16,464 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:57:00" (2/3) ... [2023-11-19 07:57:16,465 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b86fc18 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:57:16, skipping insertion in model container [2023-11-19 07:57:16,465 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:57:16" (3/3) ... [2023-11-19 07:57:16,466 INFO L112 eAbstractionObserver]: Analyzing ICFG ludcmp.c [2023-11-19 07:57:16,487 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 07:57:16,487 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-19 07:57:16,556 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 07:57:16,562 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@b452653, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-19 07:57:16,562 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-19 07:57:16,566 INFO L276 IsEmpty]: Start isEmpty. Operand has 50 states, 48 states have (on average 1.6041666666666667) internal successors, (77), 49 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:57:16,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-11-19 07:57:16,572 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:57:16,573 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:57:16,574 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:57:16,579 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:57:16,580 INFO L85 PathProgramCache]: Analyzing trace with hash 1809811384, now seen corresponding path program 1 times [2023-11-19 07:57:16,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-19 07:57:16,594 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1652279950] [2023-11-19 07:57:16,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:57:16,595 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-19 07:57:16,595 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81aa32e4-2f94-4f15-ba49-2a3f1e65f3ab/bin/uautomizer-verify-uCwYo4JHxu/mathsat [2023-11-19 07:57:16,598 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81aa32e4-2f94-4f15-ba49-2a3f1e65f3ab/bin/uautomizer-verify-uCwYo4JHxu/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-19 07:57:16,601 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81aa32e4-2f94-4f15-ba49-2a3f1e65f3ab/bin/uautomizer-verify-uCwYo4JHxu/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2023-11-19 07:57:16,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:57:16,680 INFO L262 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-19 07:57:16,685 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:57:16,861 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:57:16,861 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 07:57:16,862 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-19 07:57:16,862 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1652279950] [2023-11-19 07:57:16,863 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1652279950] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:57:16,863 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:57:16,863 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-19 07:57:16,865 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268117553] [2023-11-19 07:57:16,866 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:57:16,871 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 07:57:16,871 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-19 07:57:16,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 07:57:16,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-19 07:57:16,905 INFO L87 Difference]: Start difference. First operand has 50 states, 48 states have (on average 1.6041666666666667) internal successors, (77), 49 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:57:18,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:57:18,280 INFO L93 Difference]: Finished difference Result 102 states and 159 transitions. [2023-11-19 07:57:18,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 07:57:18,290 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2023-11-19 07:57:18,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:57:18,298 INFO L225 Difference]: With dead ends: 102 [2023-11-19 07:57:18,299 INFO L226 Difference]: Without dead ends: 17 [2023-11-19 07:57:18,302 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-19 07:57:18,306 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 65 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-11-19 07:57:18,307 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 112 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-11-19 07:57:18,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2023-11-19 07:57:18,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 14. [2023-11-19 07:57:18,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 13 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:57:18,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2023-11-19 07:57:18,342 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 7 [2023-11-19 07:57:18,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:57:18,342 INFO L495 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2023-11-19 07:57:18,343 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:57:18,345 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2023-11-19 07:57:18,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-11-19 07:57:18,346 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:57:18,346 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:57:18,355 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81aa32e4-2f94-4f15-ba49-2a3f1e65f3ab/bin/uautomizer-verify-uCwYo4JHxu/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2023-11-19 07:57:18,548 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81aa32e4-2f94-4f15-ba49-2a3f1e65f3ab/bin/uautomizer-verify-uCwYo4JHxu/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-19 07:57:18,549 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:57:18,550 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:57:18,550 INFO L85 PathProgramCache]: Analyzing trace with hash -1948892579, now seen corresponding path program 1 times [2023-11-19 07:57:18,551 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-19 07:57:18,551 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [803300909] [2023-11-19 07:57:18,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:57:18,551 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-19 07:57:18,552 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81aa32e4-2f94-4f15-ba49-2a3f1e65f3ab/bin/uautomizer-verify-uCwYo4JHxu/mathsat [2023-11-19 07:57:18,553 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81aa32e4-2f94-4f15-ba49-2a3f1e65f3ab/bin/uautomizer-verify-uCwYo4JHxu/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-19 07:57:18,571 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81aa32e4-2f94-4f15-ba49-2a3f1e65f3ab/bin/uautomizer-verify-uCwYo4JHxu/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2023-11-19 07:57:18,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:57:18,799 INFO L262 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-19 07:57:18,801 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:57:19,159 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:57:19,160 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:57:19,486 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:57:19,487 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-19 07:57:19,487 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [803300909] [2023-11-19 07:57:19,487 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [803300909] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:57:19,487 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-19 07:57:19,487 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2023-11-19 07:57:19,488 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868366487] [2023-11-19 07:57:19,488 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-19 07:57:19,489 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-19 07:57:19,489 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-19 07:57:19,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-19 07:57:19,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-11-19 07:57:19,491 INFO L87 Difference]: Start difference. First operand 14 states and 16 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:57:21,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:57:21,968 INFO L93 Difference]: Finished difference Result 38 states and 48 transitions. [2023-11-19 07:57:21,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-19 07:57:21,975 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2023-11-19 07:57:21,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:57:21,976 INFO L225 Difference]: With dead ends: 38 [2023-11-19 07:57:21,976 INFO L226 Difference]: Without dead ends: 26 [2023-11-19 07:57:21,977 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2023-11-19 07:57:21,979 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 64 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2023-11-19 07:57:21,979 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 23 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2023-11-19 07:57:21,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2023-11-19 07:57:21,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2023-11-19 07:57:21,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.24) internal successors, (31), 25 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:57:21,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 31 transitions. [2023-11-19 07:57:21,986 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 31 transitions. Word has length 11 [2023-11-19 07:57:21,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:57:21,987 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 31 transitions. [2023-11-19 07:57:21,987 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:57:21,987 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 31 transitions. [2023-11-19 07:57:21,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-11-19 07:57:21,988 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:57:21,989 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:57:22,002 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81aa32e4-2f94-4f15-ba49-2a3f1e65f3ab/bin/uautomizer-verify-uCwYo4JHxu/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2023-11-19 07:57:22,201 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81aa32e4-2f94-4f15-ba49-2a3f1e65f3ab/bin/uautomizer-verify-uCwYo4JHxu/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-19 07:57:22,201 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:57:22,202 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:57:22,202 INFO L85 PathProgramCache]: Analyzing trace with hash -439332020, now seen corresponding path program 2 times [2023-11-19 07:57:22,203 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-19 07:57:22,203 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [742162376] [2023-11-19 07:57:22,203 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-19 07:57:22,203 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-19 07:57:22,203 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81aa32e4-2f94-4f15-ba49-2a3f1e65f3ab/bin/uautomizer-verify-uCwYo4JHxu/mathsat [2023-11-19 07:57:22,205 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81aa32e4-2f94-4f15-ba49-2a3f1e65f3ab/bin/uautomizer-verify-uCwYo4JHxu/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-19 07:57:22,235 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81aa32e4-2f94-4f15-ba49-2a3f1e65f3ab/bin/uautomizer-verify-uCwYo4JHxu/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2023-11-19 07:57:22,989 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-19 07:57:22,989 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:57:23,024 INFO L262 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-19 07:57:23,026 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:57:23,379 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 16 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-19 07:57:23,380 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:57:23,688 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 16 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-19 07:57:23,689 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-19 07:57:23,689 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [742162376] [2023-11-19 07:57:23,689 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [742162376] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:57:23,689 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-19 07:57:23,690 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2023-11-19 07:57:23,690 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1747679231] [2023-11-19 07:57:23,690 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-19 07:57:23,690 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-19 07:57:23,691 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-19 07:57:23,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-19 07:57:23,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2023-11-19 07:57:23,692 INFO L87 Difference]: Start difference. First operand 26 states and 31 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:57:27,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:57:27,147 INFO L93 Difference]: Finished difference Result 126 states and 151 transitions. [2023-11-19 07:57:27,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-19 07:57:27,148 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2023-11-19 07:57:27,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:57:27,150 INFO L225 Difference]: With dead ends: 126 [2023-11-19 07:57:27,151 INFO L226 Difference]: Without dead ends: 102 [2023-11-19 07:57:27,151 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2023-11-19 07:57:27,153 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 93 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2023-11-19 07:57:27,153 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [93 Valid, 37 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2023-11-19 07:57:27,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2023-11-19 07:57:27,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 71. [2023-11-19 07:57:27,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 70 states have (on average 1.1714285714285715) internal successors, (82), 70 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:57:27,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 82 transitions. [2023-11-19 07:57:27,172 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 82 transitions. Word has length 23 [2023-11-19 07:57:27,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:57:27,172 INFO L495 AbstractCegarLoop]: Abstraction has 71 states and 82 transitions. [2023-11-19 07:57:27,173 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:57:27,173 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 82 transitions. [2023-11-19 07:57:27,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-11-19 07:57:27,174 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:57:27,174 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:57:27,196 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81aa32e4-2f94-4f15-ba49-2a3f1e65f3ab/bin/uautomizer-verify-uCwYo4JHxu/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2023-11-19 07:57:27,387 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81aa32e4-2f94-4f15-ba49-2a3f1e65f3ab/bin/uautomizer-verify-uCwYo4JHxu/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-19 07:57:27,387 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:57:27,388 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:57:27,388 INFO L85 PathProgramCache]: Analyzing trace with hash 756876242, now seen corresponding path program 1 times [2023-11-19 07:57:27,389 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-19 07:57:27,389 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [792734765] [2023-11-19 07:57:27,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:57:27,389 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-19 07:57:27,389 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81aa32e4-2f94-4f15-ba49-2a3f1e65f3ab/bin/uautomizer-verify-uCwYo4JHxu/mathsat [2023-11-19 07:57:27,395 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81aa32e4-2f94-4f15-ba49-2a3f1e65f3ab/bin/uautomizer-verify-uCwYo4JHxu/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-19 07:57:27,412 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81aa32e4-2f94-4f15-ba49-2a3f1e65f3ab/bin/uautomizer-verify-uCwYo4JHxu/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2023-11-19 07:57:27,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:57:27,978 INFO L262 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-19 07:57:27,980 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:57:28,863 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:57:28,864 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:57:29,635 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:57:29,635 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-19 07:57:29,635 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [792734765] [2023-11-19 07:57:29,635 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [792734765] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:57:29,636 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-19 07:57:29,636 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2023-11-19 07:57:29,636 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694522189] [2023-11-19 07:57:29,636 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-19 07:57:29,637 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-19 07:57:29,637 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-19 07:57:29,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-19 07:57:29,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2023-11-19 07:57:29,638 INFO L87 Difference]: Start difference. First operand 71 states and 82 transitions. Second operand has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:57:36,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:57:36,533 INFO L93 Difference]: Finished difference Result 137 states and 164 transitions. [2023-11-19 07:57:36,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-19 07:57:36,542 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2023-11-19 07:57:36,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:57:36,543 INFO L225 Difference]: With dead ends: 137 [2023-11-19 07:57:36,543 INFO L226 Difference]: Without dead ends: 98 [2023-11-19 07:57:36,544 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2023-11-19 07:57:36,545 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 47 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 177 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 177 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.7s IncrementalHoareTripleChecker+Time [2023-11-19 07:57:36,546 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 44 Invalid, 178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 177 Invalid, 0 Unknown, 0 Unchecked, 6.7s Time] [2023-11-19 07:57:36,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2023-11-19 07:57:36,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 98. [2023-11-19 07:57:36,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 97 states have (on average 1.1546391752577319) internal successors, (112), 97 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:57:36,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 112 transitions. [2023-11-19 07:57:36,563 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 112 transitions. Word has length 23 [2023-11-19 07:57:36,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:57:36,564 INFO L495 AbstractCegarLoop]: Abstraction has 98 states and 112 transitions. [2023-11-19 07:57:36,564 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:57:36,564 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 112 transitions. [2023-11-19 07:57:36,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-11-19 07:57:36,565 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:57:36,565 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 4, 2, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:57:36,588 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81aa32e4-2f94-4f15-ba49-2a3f1e65f3ab/bin/uautomizer-verify-uCwYo4JHxu/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2023-11-19 07:57:36,780 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81aa32e4-2f94-4f15-ba49-2a3f1e65f3ab/bin/uautomizer-verify-uCwYo4JHxu/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-19 07:57:36,780 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:57:36,780 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:57:36,781 INFO L85 PathProgramCache]: Analyzing trace with hash -642360546, now seen corresponding path program 2 times [2023-11-19 07:57:36,781 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-19 07:57:36,781 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1022471556] [2023-11-19 07:57:36,781 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-19 07:57:36,782 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-19 07:57:36,782 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81aa32e4-2f94-4f15-ba49-2a3f1e65f3ab/bin/uautomizer-verify-uCwYo4JHxu/mathsat [2023-11-19 07:57:36,783 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81aa32e4-2f94-4f15-ba49-2a3f1e65f3ab/bin/uautomizer-verify-uCwYo4JHxu/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-19 07:57:36,784 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81aa32e4-2f94-4f15-ba49-2a3f1e65f3ab/bin/uautomizer-verify-uCwYo4JHxu/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2023-11-19 07:57:37,548 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-19 07:57:37,548 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:57:37,583 INFO L262 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-19 07:57:37,585 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:57:38,619 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 31 proven. 32 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-19 07:57:38,619 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:57:39,477 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 31 proven. 32 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-19 07:57:39,478 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-19 07:57:39,478 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1022471556] [2023-11-19 07:57:39,478 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1022471556] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:57:39,478 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-19 07:57:39,478 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2023-11-19 07:57:39,478 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2121479855] [2023-11-19 07:57:39,479 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-19 07:57:39,479 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-19 07:57:39,479 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-19 07:57:39,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-19 07:57:39,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2023-11-19 07:57:39,481 INFO L87 Difference]: Start difference. First operand 98 states and 112 transitions. Second operand has 14 states, 14 states have (on average 3.5) internal successors, (49), 14 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)